From: Li Huafei lihuafei1@huawei.com
stable inclusion from stable-v5.10.106 commit b297cf764d8c22b8b775f540b13c85f1675dc945 bugzilla: https://gitee.com/openeuler/kernel/issues/I573US
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit a365a65f9ca1ceb9cf1ac29db4a4f51df7c507ad upstream.
Since kprobe_int3_handler() is called in do_int3(), probing do_int3() can cause a breakpoint recursion and crash the kernel. Therefore, do_int3() should be marked as NOKPROBE_SYMBOL.
Fixes: 21e28290b317 ("x86/traps: Split int3 handler up") Signed-off-by: Li Huafei lihuafei1@huawei.com Signed-off-by: Borislav Petkov bp@suse.de Acked-by: Masami Hiramatsu mhiramat@kernel.org Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20220310120915.63349-1-lihuafei1@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yu Liao liaoyu15@huawei.com Reviewed-by: Wei Li liwei391@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- arch/x86/kernel/traps.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 5da01819fb47..303970bba0f8 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -658,6 +658,7 @@ static bool do_int3(struct pt_regs *regs)
return res == NOTIFY_STOP; } +NOKPROBE_SYMBOL(do_int3);
static void do_int3_user(struct pt_regs *regs) {